Dental tool.



0. SCHWALB.

DENTAL TOOL.

APPLICATION'FILED JULY 22. m5.

Patented May'22,191 7.

mum/r01? OTTO SGHWALB ATTORNEYS i TE :unwJEnsnY, Assmnon TO Bonnier r1.LIEBERTHAL,

" DENTAL Toot,

To all whom it may concern:

Be it known that I, OTTO SOHWALB, a citi- New Jersey, have inventedcertain new and useful Improvements in Dental Tools, of which thefollowing is a specification. 7

My improvement relatesfto tools and has for its object to provide asimple and highly eflicient implement adapted to be used for polishing,cutting and other purposes in con nection with various arts. Myinvention will be fully described hereinafter and the features ofnovelty will be pointed-out in the appended claims.

In the accompanying drawings, whichillustrate an example of myinvention, Figure 1 is an elevation of my improved tool; Fig. 2 isan'edge view thereof; Fig. 3 'is' a vertical section on'the line 3-3 ofFig.1 and Fig. 4 is a horizontal section on the line 44 of Fig. 2.

As shown in the-drawings the tool comprises a main tubular section 5,internally screw-threaded at its upper end to receive the neck 6 of asleeve or the like 7, the latter in turn having a second screw-threadedneck 8 upon which the casing 9 is arranged to be detachably secured. Ashaft 10 rotatably fits the sleeve 7 and extends through the same inoppositedirections and has its lower end located in the main section 5.The

upper end of said shaft 10 carries a pinion- 11 located within-thecasing 9 and rotatable upon a washer 12 therein, which washer en'- gagesthe end of the neck 8 and prevents the shaft 10 from moving lengthwiseof the Any suitable axial movement of the shaftin the opposite directionas for instance a collar 13 secured upon said shaft 10 and arranged toengage the end of the neck 6. A sleeve or tubular member 14 extendstransversely across the,

casing 9 and is provided near its-one end with an'annular flange 15adapted to-rotatably fit withinsaid casing 9 and has its oppositeend'journaled in a cap 16' detachably secured in said casing in anysuitable mannor as by screw-threading. Thesaid sleeve 14 whichpreferably projects outwardly be-.

yond the cap 16 thus has its axis at'right angles to the axis of theshaft 10 and carries a pinion 17 in mesh with the pinion 11 as shown inF g- :3. A counter shaft 18 ex specmmmettersmfit Patented May-22.1 1917.

App1ieationfi1edJ'u1y22,1915. Seria1No.41,32 Q 7 tends into the sleeve14 and in the illustrated example is provided witha recessed portion 191n engagement with an'inwardly extending pro ection 20 on the sleeve 14whereby said counter shaft and sleeve are connected to rotate in unison.It will of course be understood that the illustrated means forconnecting the counter shaft. 18 and sleeve 14 together is only anexample and that other equivalent arrangements may be substituted. Inorder-that a movement of the counter shaft 18 lengthwise of the sleeve14 may be prevented, I have provided a locking lever 21 pivo-ted at 22ina vertical slot 9 formed in the cas ng 9, the said lever 21- in itsoperative position being arran'ged'to extend into an annular groove 1 23located on the counter shaft 18. Itwill be obvious that the countershaft 18 may be held against axial movement in the sleeve 14 in anyother way. if desired,

the illustrated arrangement representing a simple example which permitsa free rotation of said counter shaft and yet prevents an axial movementthereof relatively, to the sleeve-14. At its outer end the counter shaftl8carries a'pulley 24, located'centrally beneath and at a distance fromauxiliary pulleys 25 which are rotatably mounted on axles -26 projectingfrom arms 27 preferably having 'a resilient tendency torspread apart.The arms 27 are carried by a collar 28 surrounding the upper end ofthemain section 5 and clam ed between a bead 5 thereof and the sleeve asshown ineFig. 3. In order to prevent rotation of the collar--28 aboutits axis the arms 27 carry. ayoke 29 having members .30 adapted toengage the opposite sides of the casing 9 Wl11Cl1 are substantiallyflat/ land preferably" converge toward the locking lever 21' asillustrated in Fig.4.

IAn endless element or band 31 is arranged to travel over the pulleys 24and 25 and to receive motion from the pulley 24, the operative portion31 of said element normally extending in. a substantially straight linebetween the two pulleys '25 as. shown by solidlines in Fig. 1. Thiselement or band 31 may be an endless belt having an abrasive or othercutting surface, or itmay be an endless belt provided with apolishingsurfaceor it maybe an endless flexible band saw or any other device,this depending on the use to which the'tool is to be put. The

main .se ction 5 maylbe operatively combined w th, any mechanism asforinstance an ordinary shaft adapted for connection with the shaft 10 andwhereby the latter is driven. As this shaft 10 is driven it will rotatethe pinion 11 which in turn will rotate the pinion 17 whereby the sleeve14 and consequently the counter shaft 18 and pulley 2 1 will besimilarly actuated. The rotation of the pulley 24: will impart a linearmovement to the element 31 and cause it to travel over and between thepulleys 25, the element 31 being maintained under tension and in properfrictional engagement with the pulley 24 by the resiliency of the arms27 and their tendency to spread apart. By utilizing the section 5 or anycontinuation thereof as a handle the portion 31 of the element or band31 may be readily and conveniently manipulated in connection with theelement under treatment. For instance if the band 31 is provided with anabrasive or a polishing surface the same nny be utilized as a dentaltool for cleaning and polishing .teeth, the arrangement making itpossible to easily reach each and every tooth including the back teeth.The portion 31 of the band 31 is further capable of being caused totravel between adjacent teeth and thus used to space same or to cut awayportions of said teeth to form the required space therebetween. Ineither case owing to the perfect control of the tool the danger ofunintentionally destroying tissue is reduced to a minimum and much moreeffective and uniform results are attained than heretofore because ofthe fact that the band 31 travels continuously in one direction when inoperation. The band 31 being flexible the portion 31 will readilyaccommodate itself to convex and other surfaces as shown for instance bydotted lines in Fig. 1, the arms 21 yielding inwardly and at all timesmaintaining said band 31 under the required tension.

' It will readily be apparent that the tool may be utilized forpolishing parts of machinery or other elements and owing to thearrangement of the portion 31 of the band 31 is particularly adapted forreaching parts which are ordinarily not readily accessible, thusofttimes making it unnecessary to dismantle a mechanism in order topolish a certain part thereof. If the band 31 comprises an endless sawthe section may be combined with a suitable handle and suitableoperating mechanism and then used for sawing off limbs from trees andthe like and for other pruning purposes. In this case it is unnecessaryin most instances for the operator to climb the tree or use a ladder asthe handle may be made long enough to bring the portion 31 to aconsiderable height. During the sawingoff a limb of a tree, the ends ofthe arms 27 may rest against the same to properly support the portion 31during the sawing operation.

dental engine having a driving The tool is thus capable of being easilymanipulated under all conditions. It will be evident that my improvedimplement is capable of use in many other ways and that the above areonly examples of its utility. The parts of the tool are capable of beingreadily disconnected when for any reason this becomes necessary and arealso easily 7 assembled so that the tool may be kept in a condition ofmaximum efficiency at all times with a minimum of effort. The pulleysand endless band and their supports may if desired be arranged as anattachment capable of being temporarily combined with any standardinstrument as for instance a dental engine or the like. 7

Various changes in the specific form shown and described may be madewithin the scope of the-claims without departing from the spirit of myinvention; r

I claim: A

' 1. The combination of a handle having a flattened surface, a collarrotatably carried by said handle, members secured to said collar andextending beyond said handle, a

flattened surface on one of said 'members adapted to cooperate with theflattened surface of said handle to prevent a rotation of said collarwhereby said members are maintained in a predetermined position, pulleyson said members, a driving pulley on said. handle, an endless bandpassing over said pulleys and means for operating said driving pulleywhereby said band is actuated.

2. The combination of a handle having a pair of flattened surfacesconverging outwardly, a collar rotatably carried 'by said handle belowsaid surfaces, arms secured to said collar and extending beyond saidhandle, a yoke connecting said arms at an in-' termediate point andadapted to engage said converging surfaces to prevent a rotation of saidcollar, an endless band carried by said arms and means for actuatingsaid band relatively to said arms.

3. The combination of a handle, a collar detachably' and rotatablysecured thereon, members carried by said collar and extending beyondsaid handle, means connected with said members and engaging cooperatingportions of said handle to prevent a rotation of said collar about itsaxis, a driving pulley carried by said handle,'pul leys located at thefree ends of said members, an endless band passing over saidpulleys, andmeans for operating said driving pulley whereby said band is actuated.

4. The combination of a tubular handle, a sleeve connected therewith, acasing detachably connected with said sleeve, a driving,

a pinion on said tubular member in mesh With the pinion on said drivingshaft, a counter shaft in said tubular member,means for connecting saidmember and countershaft together to rotate in unison, releasable meansfor preventing a lengthwise movement of said counter-shaft in saidtubular member, a driving pulley carried by said counter-shaft, normallydiverging fiexiblel arms. 15 I In testimony whereof I have hereunto setmy hand. OTTO SCHWALB,D. D. S.

Copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of Patents,

' Washington. D. G.

